# OPEN Command [GstarCAD 2020](Help%20System/GSTARCAD/2020/Index.md) → [Commands](Help%20System/GSTARCAD/2020/Commands/(Commands).md) → [O](Help%20System/GSTARCAD/2020/Commands/O/(O).md) The OPEN command is used to open the existing drawing. Command Access: > **Menu:** File \> Open > **Command:** OPEN Function Description: Users could open or load part drawings including specified geometrics in viewports or layers. In the "Select Files" dialog box, click button of the "Open" button and select "Open Read-Only". If the FILEDIA system variable is specified to 0, the OPEN command will only display command prompt without dialog box. Note: if the opened drawing containing macros, the "Macros AntiVir" dialog box pops up. ## Other versions with matching text [GstarCAD 2016](../../../2016/Commands/O/OPEN%20Command--c200419df33b.md) · [GstarCAD 2017](../../../2017/Commands/O/OPEN%20Command--c200419df33b.md) · [GstarCAD 2018](Help%20System/GSTARCAD/2018/Commands/O/OPEN%20Command--c200419df33b.md) · [GstarCAD 2019](../../../2019/Commands/O/OPEN%20Command--c200419df33b.md) · [GstarCAD 2021](../../../2021/Commands/O/OPEN%20Command--c200419df33b.md)